GitLab

PowerOff screen recovery :

/**
 * Usage :
 *
 * onResume()
 * mScreenOffWakeupReceiver = new ScreenOffWakeupReceiver();
 * // optional if we should return to a specific activity
 * mScreenOffWakeupReceiver.setWakeupActivity( getPackageManager().getLaunchIntentForPackage(getPackageName()));
 * registerReceiver(mScreenOffWakeupReceiver, mScreenOffWakeupReceiver.getFilters());
 *
 * onPause()
 * if (mScreenOffWakeupReceiver!=null)
 *    unregisterReceiver( mScreenOffWakeupReceiver );
 *
 *    Requires Permission:   android.permission.WAKE_LOCK

 */
public class ScreenOffWakeupReceiver extends BroadcastReceiver {
    private static final String TAG = "ScreenOffWakeupRcvr";
    public static final String ACTION_COLD_WATER = "com.buzztime.intent.action.COLD_WATER";
    private static Intent wakeupIntent = null;

    public void setWakeupActivity( Intent intent ){
        wakeupIntent = new Intent(intent);
        wakeupIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NO_ANIMATION | Intent.FLAG_ACTIVITY_NEW_TASK);
    }

    public IntentFilter getFilters() {
        return new IntentFilter(){{
            addAction(Intent.ACTION_SCREEN_OFF);
            addAction(ACTION_COLD_WATER);
        }};
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        Log.d(TAG, action);

        if (Intent.ACTION_SCREEN_OFF.equals(action)) {

            // Screen off indicated..
            // Use AlarmManager to wake the unit up again
            Intent i = new Intent(ACTION_COLD_WATER)
                .setClass(context, ScreenOffWakeupReceiver.class);
            PendingIntent sender = PendingIntent.getBroadcast(context, 192837, i, PendingIntent.FLAG_UPDATE_CURRENT);

            // Get the AlarmManager service
            AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
            if (Build.VERSION.SDK_INT >= 23 ){
                am.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 500, sender);
            } else
            if (Build.VERSION.SDK_INT >= 19){
                am.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 750, sender);
            } else {
                am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 500, sender);
            }

        } else if (ACTION_COLD_WATER.equals(action)) {
            // after a short pause, AlarmManager will wake us up and let us run our activity
            PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
            if (!pm.isInteractive()) {
                PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK
                    | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE , "wlKiosk");
                wl.acquire(10000);
                PowerManager.WakeLock wlCpu = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "wlKioskCpu");
                wlCpu.acquire(10000);
                wlCpu.release();
            }

            if (wakeupIntent!=null) {
                context.startActivity( wakeupIntent );
            }

        }
    }
}